Gtjretta e



N0 6I4,835. Patented Nov. 29, I898. w. H. GARRUTHERS.

NUT LOOK.

li on fl1ed Mm. 14, 1898 UNITED STATES VILLIAM Il. CARRUTHERS, OF CHICAGO, ILLINOI S, ASSIGNOR 'lO MAR- GURETTA E. CARRUTHERS, OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 614,835, dated November 29, 1898.

Application filed March 14., 1898.

T0 (tl whom it 7nay conccrn:

Be it known that I, WILLIAM H. CARRUTH- ERS, a citizen of the United States, residingat Ohicago, in the county of 000k and State of lllinois, have made a certain new and useful Improvement in Nut-Locks, of which the following is a full, clear, and exact description, such as Will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevational view of a bolt and nut, showing my improved nut-lock in position on the bolt. Fig. 2is an end elevational view of the same. Fig. 3 is an enlarged elevational view showing a portion of a bolt and nut, rny improved nut-lock being shown in a locked position and in section. Fig. et is a sectional view on line 4 4, Fig. 3, the nnt being omitted. Fig. 5 is a view illustrating the position of the nut-lock when the same is being screwed upon the bolt. Fig. 6 is a similar view illustrating the position of the nut-lock when the same is being unscrewed from the bolt. Fig. 7 is a view of a modified form of nut-lock, the same being in a normal position; and Figs. 8, 9, and 10 illustrate dif-- ferent forms of material which maybe used in constructing my improved mat-look, the same being in cross-section.

This invention relates to a new and useful improvement in nnt-locks, being designed particularly as an improvement in that class of nut-locks illustrated in the patent granted Frank G. Stark March 1,1898, No.600,097; and it consists, generally stated, in arranging a split ring on the bolt, which ring tightly ennbraces said bolt, and by the friction caused by the grip thereon said ring prevents the nut from unscrewing or becoming loose.

My present invention consists in extending the ends of the ring past each other, so that when the nut is turned back and contacts With the end of the ring nearest thereto it forces the same outwardly, causing the ring to more tightly bind in the threads, the near end of the ring relative to the nut holding the farther end of the ring more -firnnly in position. For convenience in introducing and removing rnyimproved nut-lock on the Serial No. 673,768. (No inodel.)

bolt I preferably bend the overlapping ends outwardly.

In the (1 rawings, A indicates a bolt, and B the nut, such parts being of any ordinary or approved construction.

0 indieates a coilecl ring of any desired cross-section, the ends of which overlap each other and are preferably bent outwardlyto offer means for tnrning the ring on to or oif from the bolt. This ring is designed to be coiled, so that when introduced on the.bolt it Will tightly grip said bolt by fitting in threads thereon.

The operation of my hut-lock' is as follows: In introducing the same on to a bolt the end 0, which I will terrn the rear end, is grasped, which causes the ring to be sprung outwardly at its rear portion, as shown in Fig. 5. The look is then turned until the end 0 contacts With the nnt, as shown in Fig. 1. If the advance end 0 were grasped in this operation of introdncing the look on to the bolt, it would be a difficult task by reason of the tendency of the ring to more firmly grasp the bolt under these conditions.

If it is desired to remove the look from the bolt, the end 0 is grasped and the look turned thereby, snob position being shown in Fig. 0 for reasons stated just above.

In most instances where bolts and nuts are employed the cause of a loose nnt is due to the unequal pressure thereon in a direction longitudinally of the bolt. When this pressure is removed, the nut settles in its new position, and when the pressure is again applied it is directed against the nnt in such new position, and therefore all rotary movement of the nut occurs during a relaxation of pressure. This being true, the only pressure brought to bear against the ring when thesame is screwed against the nut,as shown in Fig. 1,is the weight of the nut itself. The resistanoe offered by the ring nnder these conditions is snfficient of itself to prevent the nut from continuing its backward rotation, and consequently the nut is locked or arrested inits position. Underse vere strain it might be possible that the nut would tend to crowd the ring, and in such an event the advance end 0' wonld be sprung out of its thread, as shown in Fig. 3, and would bear against the other or overlappin g end of the ring, holding the same more firmly in position in the thread, suoh resistanoe increasing in proportion to the advance of the nut until the nut is absoiutelylooked in place, resisting the power of a wrench. This is advantageous in that it being designed to app1y and remove the ring by the use of a specia1 tool, the ends c and c being thus considerably shortened, it Will prevent unauthorized pensons from tampering Wth the nut and possibly removing the same.

In Fig. 7 the ends of the ring are shown as overlapping each other a short distance, such a construction being found to answer equally as well as that illustrated in Figs. 1 to In Fig. 3 I have shown the wire of Whioh the look is preferably composed as being pearshaped in cross-section; but it is obvious that the round, diarnond, or triangular cross-sections shown in Figs. 8, 9, and 10 can as well be used, as oan also other forms.

I am aware that minor changes in the construction, arrangement, and oombination of the several parts of my look can be made and substituted for those herein shown and described without in the 1east departing from the nature and principle of my invention.

Having thus described my invention,wbat I daim, and desire to seoure by Letters Patent, is

1. A nut-Iock comprising a ooiled pieee of spring 1netal whose ends over1ap eaoh other a short distance, said ends being bent outwardly, substantialiy as described.

2. The herein-described nut-loek comprising a ring whose ends overiap each other in partial convolution, the cross-section of said ring being such that, When in position, and crowded by the nut, the advance end of the ring Will engage and more firmly seat its overlapping companion.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, this 26th day of February, 1898.

XVILLIAM H. CARRUTHERS.

Vitnesses:

F. R. CORNVVALL, HUGH K. WAGNER. 

